A riddle that requires a handful of knowledge and vocab.

When, were two as one undone? Two cleft to four, Nix one for a kismet door, Stalling one from one. Oh, how? Does mix one, two - and one more, Showing for it, four, When the one, and one more Are partitioned by the kismet door If, then, Chance, of the fur, and many others' more, is scrawled tenor of doom? The room's torturous purport of floor, of plafond, walls, and door. One's sense half quadrifid now, It looks to two, and the kismet door, ENcraty slips, dignity abhorred, One and none more, What is as cleft as one from four?